lab 7

This map is about counties with a black alone population greater than zero, ranked by percent.The first impression after glancing at this map is that there is very few black people compared to other races, in most of the Midwestern, northwestern, and southwestern states. Although there are slightly higher percentages in the northeastern states, the highest proportions of black people are in the South.

And this map is about counties with a asian alone population greater than zero, ranked by percent.There are some historical reason caused the result of the spread and proportion of the Asian population even to this day, as demonstrated by this map.

The final map shows the percentage of the population that is "some other race alone". Although there are several apparent trends in the proportions of “Some Other Race” in counties across the United States, it is difficult to decipher the causes of these patterns because of the ambiguous nature of the racial category.

Conclusion:

This lab is one of the most interesting lab I have had. By making those maps, I got more familiar with ArcGIS, I know how to join data into the map and present the data through the map. I am able to change the properties of the map and make them in my own way. Also, by making those maps, I learned some different historical knowledge as well, I can learn some knowledge from the distribution showed on the map.